Spray type heat-exchanging unit

Abstract

A spray type heat-exchanging unit includes a main body; a distributive refrigerant spray module located in an upper part of the main body and having an extended distributor and a refrigerant spray surface; and a plurality of heat exchange tubes provided in the main body below the distributive refrigerant spray module. A liquid refrigerant is guided into the extended distributor to drip onto the refrigerant spray surface, and then uniformly sprayed onto the heat exchange tubes. Gaseous refrigerant produced by evaporation in heat exchange in the main body is recovered via a top opening of the main body, making the mechanical refrigerating apparatus more efficient than a refrigerating apparatus adopting a flooded evaporator, and minimizing the refrigerant charge amount and material cost required by the heat-exchanging unit.

What is claimed is: 
     
       1. A spray type heat-exchanging unit, comprising:
 a main body defining an internal receiving space and a top opening communicating with said receiving space; 
 a plurality of heat exchange tubes provided in a lower part of said receiving space of said main body; and 
 a distributive refrigerant spray module provided in said main body above said heat exchange tubes, and including an extended distributor, a liquid refrigerant inlet, one or more openings and a refrigerant spray surface; said extended distributor being provided with a plurality of apertures, and said liquid refrigerant inlet being provided on a top of said extended distributor for guiding a liquid refrigerant into said extended distributor, so that said liquid refrigerant drips onto said refrigerant spray surface via said apertures on said extended distributor and be sprayed onto said heat exchange tubes, 
 wherein said spray surface of said distributive refrigerant spray module is provided on a top thereof with impact absorbing material selected from a group consisting of chemical fiber non-woven fabrics, plant fiber non-woven fabrics, net fabrics, metal wool and non-metal wool, 
 wherein said liquid refrigerant sprayed onto said heat tubes conducts heat exchange with said heat exchange tubes, and is vaporized into gaseous refrigerant, which flows out of said main body via said top opening of said main body, and 
 wherein said one or more openings are defined by said extended distributor, said refrigerant spray surface and one or more splash covers, such that a first pressure in the distributive refrigerant spray module is the same as a second pressure in the lower part of said receiving space due to gaseous refrigerant exhausted through the one or more openings. 
 
     
     
       2. The spray type heat-exchanging unit as claimed in  claim 1 , wherein said spray surface of said distributive refrigerant spray module is provided with a plurality of holes. 
     
     
       3. The spray type heat-exchanging unit as claimed in  claim 1 , wherein said spray surface of said distributive refrigerant spray module is provided with a plurality of slots. 
     
     
       4. The spray type heat-exchanging unit as claimed in  claim 1 , wherein said spray surface of said distributive refrigerant spray module is provided with a plurality of flow paths with grids. 
     
     
       5. The spray type heat-exchanging unit as claimed in  claim 1 , wherein said spray surface of said distributive refrigerant spray module is provided to minimize splashing of said liquid refrigerant dripped onto said spray surface. 
     
     
       6. The spray type heat-exchanging unit as claimed in  claim 1 , further comprising covers extended between said extended distributor and said refrigerant spray surface to prevent said liquid refrigerant from splashing. 
     
     
       7. The spray type heat-exchanging unit as claimed in  claim 1 , wherein said heat exchange tubes are staggered in said receiving space of said main body. 
     
     
       8. The spray type heat-exchanging unit as claimed in  claim 1 , wherein said heat exchange tubes are orderly arranged in said receiving space of said main body.